Im not a talon main, but i used to play him quite a bit, and still like to use him as a counterpick.
As for items, Armor pen is your best friend. Youmuus and black cleaver are both great on him. Otherwise, you just want to do a lot of ad. Since Talon has a fast combo with a lot of aoe, it is better for your team if you build straight damage, since you will always be able to kill the adc, plus get a big chunk off the rest of the team.
The classic talon build is something like this
Whenever i played him, i sometimes tossed around a
or
, but these are situational, with the botrk only good if the mid has a high health pool, and the zephyr only really good if your team is in constant small scale fights.
You should always have one of these three items
or
, unless the enemy is all ad.
For skill, your max order will be rwqe. Your W is your ranged harrass/ highest damage spell. Your goal in lane will be to use w to harrass the enemy down to halfish health, than burst them down.